Rico is a JavaScript library for creating rich internet applications. Version 1 is JavaScript only. Versions 2 & 3 include server-side code (asp, asp.net, and php) to make creating web apps even easier. Versions 1 & 2 are based on Prototype and include grids, calendar & tree controls, drag & drop, and cinematic effects. Version 3 goes beyond Prototype, and includes support for jQuery, MooTools, Dojo, Ext, and BBC Glow libraries. Version 3 is only available in the SVN repository. The rico3.net branch includes a .net server control.

FLEISS Frameworks is a set of programming, instrumental, application, and system frameworks to develop a free software system within an organization either non-commercial or commercial, but primarily scoping on business organizations.

Controls developed with GWT have tightly coupled behavior with their presentation, this introduce some troubles when we need to apply new theme for UI. This library introduce painless way to decouple logic from views using plain HTML templates.